How to Pick a Manufacturer for Custom Metallic Honeycomb Substrate – What I Tell People Who Ask

I been on both sides. Sold to engine guys. Watched buyers pick wrong. Good suppliers exist. Bad ones too. Hard part is knowing which is which before the PO goes out.

Picking a shop is not complicated. But don't just look at price. That's not how this works.

Know What You Want First

Don't call anyone before you know what you're asking for.

Cell density. 400 for cars. Diesel maybe different. Industrial maybe 200 or 300.

Material. Aluminum for cars. Stainless for salt or heat. Fe-Cr-Al for high temp.

Size. Diameter. Length. Roundness. Know what your line can handle.

Volume. Some shops want big contracts. Some do small runs. Find one that fits.

Shape. Round easy. Oval, racetrack, custom? Ask if they've done it. Good shop can do 100 to 600 cpsi, round or oval.

Questions to Ask

How long they been doing this? New shops make mistakes. Old ones already made theirs. You don't wanna be their practice run.

Where foil come from? If they can't say, that's a sign. Good shops know their supply. They test incoming. They can tell you what changed if something goes wrong.

How they check brazing? This is the one. Good shops test every batch. Peel test. Ultrasonic. Something. Engine guys pull one from every batch and try to peel it. Foil tears before joint gives? Good. Layers come apart clean? Bad. Supplier says "our process is solid" but can't tell you how they check? Walk.

What they do when a batch fails? Everyone fails. Difference is whether they catch it before shipping. Shop that finds its own problems is shop you can trust.

Traceability? Something fails, you need to know which batches. Good shops track everything. Which coil. Which operator. Which furnace run. Without that, they can't help you when things go sideways.

What Good Looks Like

Consistency is everything. Engine guys hate surprises. Their tuning depends on your parts. Ship a batch off, their numbers off too. Good shops keep everything the same every time. Foil. Tooling. Furnace cycle.

They call before things go bad. Not after. "Hey, foil supplier changed something. We're testing. We'll let you know before we ship."

They ask about your setup. Temps. Location. Duty cycle. They think about how their part works in your system. Not just hitting print.

They keep records. Failure happens, they can tell you which batch. Which foil. Which run. That saves weeks.

They tell you when something costs more. "We can do that tolerance, but it adds cost. You really need it?" That's honesty you want.

-

Certs

ISO 9001 baseline. IATF 16949 for auto. AS9100 for aero.

But don't just look at cert. Ask what it means day to day. Certified shop should have docs. Audits. Traceable records.

Red Flags

They say yes to everything. No questions. No pushback. They don't know what they're selling. Good shops ask. They'll tell you when something doesn't make sense.

They can't show records. Can't pull QC from last week? No real system. Doesn't need to be fancy. Needs to exist.

Price too low. Foil costs. Brazing takes time. 30% below everyone else? They're cutting something. Foil. Testing. Brazing. Something. You'll find out later.

Delivery vague. "About four weeks" means they don't control their own line. Your order shows up when it shows up.

Price

Cheap looks good upfront. But I watched buyers chase low numbers and spend months dealing with bad fits, late shipments, field failures. What they saved on PO went straight into warranty claims.

Good suppliers ain't cheap. They deliver parts that work, on time, every time. That reliability is worth it.

Bottom Line

Finding a custom metallic honeycomb substrate manufacturer not complicated. Know what you want. Ask real questions. Watch for red flags.

Price matters. Reliability matters more. Supplier who delivers consistent parts, on time, traceable records – worth paying for. Their parts carry your name.

We make metallic honeycomb substrates. If you're shopping around, that's what we do.